UPSs do have issues at times! On that I can agree when looking into them and what I was finding. As for frequent backups that is the course of wisdom many often forget however. And then the day comes when something goes wrong and...
When downloading anything when possible I download more then one copy of each thing in case of a bad download as well as having a backup since one goes to a folder on the main drive while each other will go to an identical folder on each of the two storage drives. Incrementally backing things as you go along works hand in hand with creating full system images when possible for the OS and all programs.
Now when going to run that first download and it fails that gets dumped and I simply copy one of the other downloads over if not launching it from the other drive. Not everything is stored long time on the main drive however. That will depend on just what it is.
As for outages in general I don't live in an area prone to seeing many. Of the few seen over the last several years most are only for a few hours only. A couple of good size too early in season snow storms with ice and heavy snow blew out a main transformer back on Oct 31, '11 that lasted for nearly a full week being a rare incident.
The heavy snow came while the leaves were still on the trees bringing lines down as well. 2010 however saw other areas hit with severe ice and outages lasting weeks here in the northeastern corner of the country. Trees split in half coming down on houses at times. The hilly moutainous areas see the bulk of damages as a general rule.
Now for an SSD or mechanical the same rule of thought about frequent backups should apply. Having a disaster recovery plan is what would be emphasized. With SSDs however you are dealing with the static memory over the magnetic coating on platters seen with mechanical drives.
Static memory is obviously more sensitive to certain conditions while gaps in the coating on platters produce bad sectors on mechanical drives. Wear on read/write heads and the armature also result in a drive fail while fluxuations of current and sudden dropoffs like blackouts could corrupt data on any drive not just SSDs but which tend to be more susceptible. The worst enemy for any drive or simply for hardware in general would be a heftly line surge or lightning strike which would send a surge through at times.
A defective component like a bad cap in a supply shorting things out when pushing a few extra amps into the board can cause all types of problems not just with drives where at time they actually survive while the supply and board may fail completely! The last build saw an old supply take the board with it without harm to anything else. The first board and supply for this build saw the supply go belly up and trip a 20A ac wall out right through the surge protection even as well as cooking the new board ordered with it! Fortunately all drives as well as data survived when the replacement MB was the exact same make and model.
So the Golden Rule of Thought for the day is simply backing up the backups made of the backup of the backups of the backup(s) made of the backup of the... Sometimes those old data disks just had to be tossed since you could no longer even read what files were originally burned on them when either upgrading systems or the OS or both which was usually the case. For each technology you have to be prepared for whatever setbacks are possible and simply put "be prepared"!